[UnitTests] Add studyTrackFilter tests

services/frontend/tests/unit/filters/studyTrack.test.ts

@@ -0,0 +1,63 @@
+import { assert, describe, it } from 'vitest'
+
+import { StudentStudyRight } from '@oodikone/shared/types/studentData'
+
+import { createStudent, createStudyRight as createBaseStudyRight, createStudyRightElement } from './helpers'
+
+const { studyTrackFilter } = await import('@/components/FilterView/filters/studyTrack')
+
+const createStudyRight = (overrides: Partial<StudentStudyRight> = {}): StudentStudyRight =>
+  createBaseStudyRight({
+    studyRightElements: [
+      createStudyRightElement({
+        code: 'KH50_001',
+        studyTrack: { code: 'track-1', name: { fi: 'Testisuuntautuminen' } },
+      }),
+    ],
+    ...overrides,
+  })
+
+const ARGS = { code: 'KH50_001' }
+
+void describe('studyTrackFilter', () => {
+  void it('should include student when the student is in one of the selected study tracks', () => {
+    const student = createStudent({ studyRights: [createStudyRight()] })
+
+    const result = studyTrackFilter().filter(student, {
+      args: ARGS,
+      options: { selected: ['track-1'], studyTracks: [] },
+      precomputed: undefined,
+    })
+
+    assert.strictEqual(result, true)
+  })
+
+  void it('should exclude student when the student is not in any of the selected study tracks', () => {
+    const student = createStudent({ studyRights: [createStudyRight()] })
+
+    const result = studyTrackFilter().filter(student, {
+      args: ARGS,
+      options: { selected: ['track-2'], studyTracks: [] },
+      precomputed: undefined,
+    })
+
+    assert.strictEqual(result, false)
+  })
+
+  void it('should exclude student when the study right does not match the given programme code', () => {
+    const student = createStudent({ studyRights: [createStudyRight()] })
+
+    const result = studyTrackFilter().filter(student, {
+      args: { code: 'OTHER' },
+      options: { selected: ['track-1'], studyTracks: [] },
+      precomputed: undefined,
+    })
+
+    assert.strictEqual(result, false)
+  })
+
+  void it('isActive should match the filter state', () => {
+    assert.strictEqual(studyTrackFilter().isActive({ selected: [], studyTracks: [] }, undefined), false)
+    assert.strictEqual(studyTrackFilter().isActive({ selected: ['track-1'], studyTracks: [] }, undefined), true)
+  })
+})